c# 文件流处理 常用功能记录

流	类		函数	举例
字符流	StreamReader	文本方式读取和写入文件内容的流
		构造	StreamReader	string filePath = "C:\\path\\to\\file.txt"; StreamReader reader = new StreamReader(filePath);
		逐行读取	WriteLine	string line; while ((line = reader.ReadLine()) != null) {     Console.WriteLine(line); }
		读取整个	ReadToEnd	string content = reader.ReadToEnd();
		关闭	Close	writer.Close();
		指定的编码	StreamReader	// 使用指定的编码方式创建 StreamReader 对象 StreamReader reader = new StreamReader(filePath, Encoding.UTF8);
		读取字符到缓冲区	Read	char[] buffer = new char[1024]; // 定义一个缓冲区 int charsRead = reader.Read(buffer, 0, buffer.Length); // 从流中读取字符到缓冲区 string text = new string(buffer, 0, charsRead); // 将字符数组转换为字符串
	StreamWriter	文本方式读取和写入文件内容的流
		构造	StreamWriter	string filePath = "C:\\path\\to\\file.txt"; StreamWriter writer = new StreamWriter(filePath);
		写入文本	Write	string content = "Hello, World!"; writer.Write(content);
		关闭	Close	reader.Close();
		指定的编码	StreamWriter	// 使用指定的编码方式创建 StreamWriter 对象 StreamWriter writer = new StreamWriter(filePath, false, Encoding.UTF8);
		写入换行符	WriteLine	writer.WriteLine(); // 写入一个换行符
二进制	BinaryReader
		构造	BinaryReader	string filePath = "C:\\path\\to\\file.bin"; FileStream fileStream = new FileStream(filePath, FileMode.Open); BinaryReader reader = new BinaryReader(fileStream);
		读取	Read	int intValue = reader.ReadInt32(); // 读取一个 int 值 double doubleValue = reader.ReadDouble(); // 读取一个 double 值 byte[] buffer = new byte[1024]; int bytesRead = reader.Read(buffer, 0, buffer.Length); // 读取字节数组
		关闭	Close	reader.Close(); // 关闭 BinaryReader
	BinaryWriter
		构造	BinaryWriter	string filePath = "C:\\path\\to\\file.bin"; FileStream fileStream = new FileStream(filePath, FileMode.Create); BinaryWriter writer = new BinaryWriter(fileStream);
		写入	Write	int intValue = 42; double doubleValue = 3.14; byte[] buffer = new byte[] { 0x01, 0x02, 0x03 }; writer.Write(intValue); // 写入一个 int 值 writer.Write(doubleValue); // 写入一个 double 值 writer.Write(buffer, 0, buffer.Length); // 写入字节数组
		关闭	Close	writer.Close(); // 关闭 BinaryWriter